# systemctl(1) completion                                 -*- shell-script -*-
# SPDX-License-Identifier: LGPL-2.1+
#
# This file is part of systemd.
#
# Copyright © 2010 Ran Benita

__systemctl() {
        local mode=$1; shift 1
        systemctl $mode --full --no-legend --no-pager "$@" 2>/dev/null
}

__systemd_properties() {
        @rootlibexecdir@/systemd --dump-bus-properties
}

__contains_word () {
        local w word=$1; shift
        for w in "$@"; do
                [[ $w = "$word" ]] && return
        done
}

__filter_units_by_properties () {
        local mode=$1 properties=$2; shift 2
        local units=("$@")
        local props i p n
        local names= count=0

        IFS=$',' read -r -a p < <(echo "Names,$properties")
        n=${#p[*]}
        readarray -t props < \
                  <(__systemctl $mode show --property "Names,$properties" -- "${units[@]}")

        for ((i=0; i < ${#props[*]}; i++)); do
                if [[ -z ${props[i]} ]]; then
                        if (( count == n )) && [[ -n $names ]]; then
                                echo $names
                        fi
                        names=
                        count=0
                else
                        (( count++ ))
                        if [[ ${props[i]%%=*} == 'Names' ]]; then
                                names=${props[i]#*=}
                        fi
                fi
        done
        if (( count == n )) && [[ -n $names ]]; then
                echo $names
        fi
}

__get_all_units      () { { __systemctl $1 list-unit-files "$2*"; __systemctl $1 list-units --all "$2*"; } \
        | { while read -r a b; do echo " $a"; done; }; }
__get_non_template_units() { { __systemctl $1 list-unit-files "$2*"; __systemctl $1 list-units --all "$2*"; } \
        | { while read -r a b; do [[ $a =~ @\. ]] || echo " $a"; done; }; }
__get_template_names () { __systemctl $1 list-unit-files "$2*" \
        | { while read -r a b; do [[ $a =~ @\. ]] && echo " ${a%%@.*}@"; done; }; }
__get_active_units   () { __systemctl $1 list-units "$2*"      \
        | { while read -r a b; do echo " $a"; done; }; }

__get_not_masked_unit_files() {
        # filter out masked, not-found, or template units.
        __systemctl $1 list-unit-files --state enabled,enabled-runtime,linked,linked-runtime,static,indirect,disabled,generated,transient "$2*" | \
                { while read -r a b; do [[ $a =~ @\. ]] || echo " $a"; done; }
}

__get_startable_units () {
        __filter_units_by_properties $1 ActiveState=inactive,CanStart=yes $(
                { __get_not_masked_unit_files $1 $2
                  # get inactive template units
                  __systemctl $1 list-units --state inactive,failed "$2*" | \
                      { while read -r a b c; do [[ $b == "loaded" ]] && echo " $a"; done; }
                } | sort -u )
}
__get_restartable_units () {
        # filter out masked and not-found
        __filter_units_by_properties $1 CanStart=yes $(
                { __get_not_masked_unit_files $1 $2
                  __get_active_units $1 $2
                } | sort -u )
}

__get_stoppable_units () {
        # filter out masked and not-found
        __filter_units_by_properties $1 ActiveState=active,CanStop=yes $(
                { __get_not_masked_unit_files $1 $2
                  __get_active_units $1 $2
                } | sort -u )
}

__get_reloadable_units () {
        # filter out masked and not-found
        __filter_units_by_properties $1 ActiveState=active,CanReload=yes $(
                { __get_not_masked_unit_files $1 $2
                  __get_active_units $1 $2
                } | sort -u )
}

__get_failed_units   () { __systemctl $1 list-units "$2*"      \
        | { while read -r a b c d; do [[ $c == "failed"   ]] && echo " $a"; done; }; }
__get_enabled_units  () { __systemctl $1 list-unit-files "$2*" \
        | { while read -r a b c  ; do [[ $b == "enabled"  ]] && echo " $a"; done; }; }
__get_disabled_units () { __systemctl $1 list-unit-files "$2*" \
        | { while read -r a b c  ; do [[ $b == "disabled" ]] && echo " $a"; done; }; }
__get_masked_units   () { __systemctl $1 list-unit-files "$2*" \
        | { while read -r a b c  ; do [[ $b == "masked"   ]] && echo " $a"; done; }; }
__get_all_unit_files () { { __systemctl $1 list-unit-files "$2*"; } | { while read -r a b; do echo " $a"; done; }; }

__get_machines() {
        local a b
        { machinectl list-images --no-legend --no-pager; machinectl list --no-legend --no-pager; } | \
		{ while read a b; do echo " $a"; done; }
}

_systemctl () {
        local cur=${COMP_WORDS[COMP_CWORD]} prev=${COMP_WORDS[COMP_CWORD-1]}
        local i verb comps mode

        local -A OPTS=(
               [STANDALONE]='--all -a --reverse --after --before --defaults --force -f --full -l --global
                             --help -h --no-ask-password --no-block --no-legend --no-pager --no-reload --no-wall --now
                             --quiet -q --system --user --version --runtime --recursive -r --firmware-setup
                             --show-types -i --ignore-inhibitors --plain --failed --value --fail --dry-run --wait'
                      [ARG]='--host -H --kill-who --property -p --signal -s --type -t --state --job-mode --root
                             --preset-mode -n --lines -o --output -M --machine --message'
        )

        if __contains_word "--user" ${COMP_WORDS[*]}; then
            mode=--user
        elif __contains_word "--global" ${COMP_WORDS[*]}; then
            mode=--user
        else
            mode=--system
        fi

        if __contains_word "$prev" ${OPTS[ARG]}; then
                case $prev in
                        --signal|-s)
                                _signals
                                return
                        ;;
                        --type|-t)
                                comps=$(__systemctl $mode -t help)
                        ;;
                        --state)
                                comps=$(__systemctl $mode --state=help)
                        ;;
                        --job-mode)
                                comps='fail replace replace-irreversibly isolate
                                       ignore-dependencies ignore-requirements flush'
                        ;;
                        --kill-who)
                                comps='all control main'
                        ;;
                        --root)
                                comps=$(compgen -A directory -- "$cur" )
                                compopt -o filenames
                        ;;
                        --host|-H)
                                comps=$(compgen -A hostname)
                        ;;
                        --property|-p)
                                comps=$(__systemd_properties)
                        ;;
                        --preset-mode)
                                comps='full enable-only disable-only'
                        ;;
                        --output|-o)
                                comps='short short-full short-iso short-iso-precise short-precise short-monotonic short-unix verbose export json
                                       json-pretty json-sse cat'
                        ;;
                        --machine|-M)
                                comps=$( __get_machines )
                        ;;
                esac
                COMPREPLY=( $(compgen -W '$comps' -- "$cur") )
                return 0
        fi

        if [[ "$cur" = -* ]]; then
                COMPREPLY=( $(compgen -W '${OPTS[*]}' -- "$cur") )
                return 0
        fi

        local -A VERBS=(
                [ALL_UNITS]='cat mask'
        [NONTEMPLATE_UNITS]='is-active is-failed is-enabled status show preset help list-dependencies edit set-property revert'
            [ENABLED_UNITS]='disable'
           [DISABLED_UNITS]='enable'
        [REENABLABLE_UNITS]='reenable'
             [FAILED_UNITS]='reset-failed'
          [STARTABLE_UNITS]='start'
          [STOPPABLE_UNITS]='stop condstop kill try-restart condrestart'
         [ISOLATABLE_UNITS]='isolate'
         [RELOADABLE_UNITS]='reload condreload try-reload-or-restart force-reload'
        [RESTARTABLE_UNITS]='restart reload-or-restart'
         [TARGET_AND_UNITS]='add-wants add-requires'
             [MASKED_UNITS]='unmask'
                     [JOBS]='cancel'
                     [ENVS]='set-environment unset-environment import-environment'
               [STANDALONE]='daemon-reexec daemon-reload default
                             emergency exit halt hibernate hybrid-sleep
                             suspend-then-hibernate kexec list-jobs list-sockets
                             list-timers list-units list-unit-files poweroff
                             reboot rescue show-environment suspend get-default
                             is-system-running preset-all'
                     [FILE]='link switch-root'
                  [TARGETS]='set-default'
                 [MACHINES]='list-machines'
        )

        for ((i=0; i < COMP_CWORD; i++)); do
                if __contains_word "${COMP_WORDS[i]}" ${VERBS[*]} &&
                 ! __contains_word "${COMP_WORDS[i-1]}" ${OPTS[ARG]}; then
                        verb=${COMP_WORDS[i]}
                        break
                fi
        done

        if [[ -z $verb ]]; then
                comps="${VERBS[*]}"

        elif __contains_word "$verb" ${VERBS[ALL_UNITS]}; then
                comps=$( __get_all_units $mode "$cur" )
                compopt -o filenames

        elif __contains_word "$verb" ${VERBS[NONTEMPLATE_UNITS]}; then
                comps=$( __get_non_template_units $mode "$cur" )
                compopt -o filenames

        elif __contains_word "$verb" ${VERBS[ENABLED_UNITS]}; then
                comps=$( __get_enabled_units $mode "$cur" )
                compopt -o filenames

        elif __contains_word "$verb" ${VERBS[DISABLED_UNITS]}; then
                comps=$( __get_disabled_units $mode "$cur";
                         __get_template_names $mode "$cur")
                compopt -o filenames

        elif __contains_word "$verb" ${VERBS[REENABLABLE_UNITS]}; then
                comps=$( __get_disabled_units $mode "$cur";
                         __get_enabled_units $mode "$cur";
                         __get_template_names $mode "$cur")
                compopt -o filenames

        elif __contains_word "$verb" ${VERBS[STARTABLE_UNITS]}; then
                comps=$( __get_startable_units $mode "$cur" )
                compopt -o filenames

        elif __contains_word "$verb" ${VERBS[RESTARTABLE_UNITS]}; then
                comps=$( __get_restartable_units $mode "$cur" )
                compopt -o filenames

        elif __contains_word "$verb" ${VERBS[STOPPABLE_UNITS]}; then
                comps=$( __get_stoppable_units $mode "$cur" )
                compopt -o filenames

        elif __contains_word "$verb" ${VERBS[RELOADABLE_UNITS]}; then
                comps=$( __get_reloadable_units $mode "$cur" )
                compopt -o filenames

        elif __contains_word "$verb" ${VERBS[ISOLATABLE_UNITS]}; then
                comps=$( __filter_units_by_properties $mode AllowIsolate=yes \
                      $( __get_all_units $mode "$cur" ) )
                compopt -o filenames

        elif __contains_word "$verb" ${VERBS[FAILED_UNITS]}; then
                comps=$( __get_failed_units $mode "$cur" )
                compopt -o filenames

        elif __contains_word "$verb" ${VERBS[MASKED_UNITS]}; then
                comps=$( __get_masked_units $mode "$cur" )
                compopt -o filenames

        elif __contains_word "$verb" ${VERBS[TARGET_AND_UNITS]}; then
                if __contains_word "$prev" ${VERBS[TARGET_AND_UNITS]} \
                || __contains_word "$prev" ${OPTS[STANDALONE]}; then
                        comps=$( __systemctl $mode list-unit-files --type target --all "$cur*" \
                        | { while read -r a b; do echo " $a"; done; } )
                else
                        comps=$( __get_all_unit_files $mode "$cur" )
                fi
                compopt -o filenames

        elif __contains_word "$verb" ${VERBS[STANDALONE]}; then
                comps=''

        elif __contains_word "$verb" ${VERBS[JOBS]}; then
                comps=$( __systemctl $mode list-jobs | { while read -r a b; do echo " $a"; done; } )

        elif __contains_word "$verb" ${VERBS[ENVS]}; then
                comps=$( __systemctl $mode show-environment \
                    | while read -r line; do echo " ${line%%=*}="; done )
                compopt -o nospace

        elif __contains_word "$verb" ${VERBS[FILE]}; then
                comps=$( compgen -A file -- "$cur" )
                compopt -o filenames

        elif __contains_word "$verb" ${VERBS[TARGETS]}; then
                comps=$( __systemctl $mode list-unit-files --type target --full --all "$cur*" \
                        | { while read -r a b; do echo " $a"; done; } )
        fi

        COMPREPLY=( $(compgen -o filenames -W '$comps' -- "$cur") )
        return 0
}

complete -F _systemctl systemctl
